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Cod sursa(job #307743)
//#include<algorithm>
//using namespace std;
#include<stdio.h>
#define DIM 100001
int n,m,s,f[DIM],c[DIM];
struct nod{
int x;
nod *urm;};
nod *lst[DIM];
void add(int a,int b){
nod *p=new nod;
p->x=b;
p->urm=lst[a];
lst[a]=p;}
void bf(){
int st,dr;
nod *p;
f[s]=-1;
for(c[st=dr=0]=s; st<=dr; ++st)
for(p=lst[c[st]]; p; p=p->urm)
if(p->x&&(!f[p->x]||f[c[st]]+1<f[p->x])){
if(c[st]==s)
f[p->x]=f[c[st]]+2;
else
f[p->x]=f[c[st]]+1;
c[++dr]=p->x;}}
void solve(){
int i,x0,y0;
scanf("%d%d%d",&n,&m,&s);
for(i=0; i<m; ++i){
scanf("%d%d",&x0,&y0);
add(x0,y0);}
bf();
for(i=1; i<=n; ++i){
if(!f[i])
printf("-1 ");
else if(f[i]==-1)
printf("0 ");
else
printf("%d ",f[i]);}}
int main(){
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
solve();
return 0;}